the yahngorithm
Portland State
Big Sky · FCS
20
@
San Diego State
Pac-12
53
Week 1 · 2026 · Final · USA Net · Snapdragon Stadium
Market spreadSDSU -38.5
Market total61.5
Model spreadSDSU -43.3
Edge+4.8

Spread models

SP+efficiencymodel SDSU -43.3
market SDSU -38.5  ·  edge +4.8 (home)  ·  PRST -40.1 vs SDSU +0.7 + 2.5 HFA
SRSscoring margin
no games played yet — empty in week 1, noisy through ~week 3
YahnSP+ + EPA + rostermodel SDSU -44.1
market SDSU -38.5  ·  edge +5.6 (home)  ·  PRST -40.2 vs SDSU +1.2 + 2.7 HFA

The spread signal is SP+ only right now. Market is the consensus of 8 books. Positive edge = model likes San Diego State. Guide §2.

How the Yahn number is built — not a separate model
SP+ base+ EPA+ roster= rating
PRST-40.1-0.1-40.2
SDSU+0.7+0.5+1.2

SP+ is the backbone. EPA nudges toward raw efficiency (weight grows through the season — near zero this early). Roster = talent + returning production + transfer-portal net, fading to zero by week 5. Venue home edge: 2.7 (2.7 base + altitude / hostile bump; SP+ and SRS use a flat 2.5). Weights un-calibrated.

Totals model

PRST expected
7
0.6 pts/poss
SDSU expected
45.8
3.9 pts/poss
Model total
52.8
market 61.5 · 23.6 poss, average pace
Edge
-8.7
model leans under

Only SP+ feeds this. Totals are noisier than spreads — the model's biggest UNDER edges cluster on blowouts and are mostly artifacts. Trust it most on games with a spread inside ~14. Guide §3.

Situational flags

No situational flags on this game.

Team trends · 2026 season to date

PRSTSDSU
ATS overall1-00-2
ATS at home0-1
ATS on the road1-00-1
ATS as favorite0-1
ATS as underdog1-00-1
ATS after a win0-1
ATS after a loss
W–L at home1-0
W–L on the road0-10-1
Over / Under1O–0U1O–1U

Amber = an outlier split (≥65% or ≤35% ATS on 8+ games). Trends are context, not a signal on their own.

Current lines

BookSpread (SDSU)Total
betmgm-38.5 -11061.5 -105
betonlineag-38.5 -11561 -120
betrivers-41 -11262 -109
bovada-38.5 -10560.5 -115
draftkings-38.5 -11561.5 -110
fanduel-38.5 -11861.5 -110
lowvig-38.5 -11561 -120
mybookieag-38.5 -11062.5 -110

Best SDSU number -38.5 · best PRST number +41. Best over 60.5 · best under 62.5. Latest snapshot Sep 5, 8:30 PM. Odds shown where the source provides them (live pulls only). Spread is from SDSU's side.

Line movement

Showing the 5 most recent snapshots of 19.

Prediction market · Kalshi

PRST1%
SDSU99% 1
Implied lineSDSU -31.4
Volume965k
Open interest727k
Traded 24h935k

Kalshi's market prices SDSU to win 99% — about SDSU -31.4 vs the book's SDSU -38.5. 7.1-pt gap — the market rates PRST higher than the book. Volume and open interest are total contracts on the game (each settles at $1), not a per-side split — they tell you how much to trust the price. Guide §9.

Showing the 5 most recent of 12 snapshots.

Weather

Forecast for the venue at kickoff time (nearest hour). Each row is a snapshot — expect it to firm up as the game nears; the timestamp is when that snapshot was taken.

Showing the 3 most recent of 10 readings.

Sustained wind ≥ 15 mph is the one weather factor that reliably moves a total (UNDER). Everything else is minor. Guide §4.

Injuries

No impact-player injuries listed. ESPN's CFB feed is thin — an empty report means "unknown," not "clean." Guide §4.

Picks

No pick logged. Most model disagreements never become picks — see guide §6 for the bar.

Decision support, not a guarantee. Read the interpretation guide.